Weird behavior

[llloyd4]

Let me be clear, I personally skipped from Win 7 to Win 10, this is for my Mother's laptop, that I struggle to maintain as I have little experience with 8. Anyway. There are two screens, the Metro "Start" screen, with all the icons and stuff, and there is the normal Windows desktop with the start button and all that, though the start button drops you back to the Metro screen. Right, so, the normal desktop screen normally is a greyish blue. Now it's a grey color (just the backdrop and task bar, the icons are normal color) that'll occasionally flash blue before going back to grey. If I drop back to the Start screen, it'll occasionally switch back to the desktop, which is grey, flash blue, then go back to grey before dropping you back to the Start screen. Like what in the world is this stupid thing doing?